JAVA - 자바 문자수 구하기

           public class Pack06 {

              public static void main(String[] args) {

                 if(args.length < 1) {

                    System.err.print("문자열을 입력해주세요!");

                    System.exit(-1);

                 }

                 int numLines = 1;

                 int numWords = 1;

                 int numChars = 0;

                 String s = args[0];

                 for(int i = 0, len = s.length(); i < len; ++i) {

                    switch (s.charAt(i)) {

                       case '/':

                       ++numLines;

.

                       case ' ':

                       ++numWords;

                       break;

                       default:

                       ++numChars;

                       break;

                    }

                 }

                 System.out.println("행수: " + numLines);

                 System.out.println("단어수: " + numWords);

                 System.out.println("문자수: " + numChars);

              }

           }

           //Pack07.java

           public class Pack07 {

              public static void main(String[] args) {

                 if(args.length % 2 != 0) {

                    System.err.println("학생의 수와 점수의 수가 일치하지 않습니다!");

                    System.exit(-1);

                 }

                 int numStudents = args.length / 2;

                 String[] names = new String[numStudents];

                 int[] grades = new int[numStudents];

                 //이름과 점수를 저장 

                 for(int i = 0; i < numStudents; ++i) {

                    names[i] = args[i * 2];

                    grades[i] = Integer.parseInt(args[i * 2 + 1]);

                 }

                 printNameOrder(names, grades);

                 printScoreOrder(names, grades);

              }

              public static void printNameOrder(String[] names, int[] grades) {

                 String[] tempNames = names.clone();

                 int[] tempGrades = grades.clone();

                 for(int i = 0, len = tempNames.length ; i < len; ++i ){

                    for(int j = i + 1; j < len ; ++j ) {

                       if(tempNames[j].compareTo(tempNames[i]) < 0) {

                          String stemp = tempNames[i];

                          tempNames[i] = tempNames[j];

                          tempNames[j] = stemp;

                          int iTemp = tempGrades[i];

                          tempGrades[i] = tempGrades[j];

                          tempGrades[j] = iTemp;

                       }

                    }

                 }

                 System.out.println("-------이름순-------");

                 for(int i = 0, len = names.length; i < len; ++i) {

                    System.out.println(tempNames[i] + "\t" + tempGrades[i]);

                 }

              }

              public static void printScoreOrder(String[] names, int[] grades) {

                 String[] tempNames = names.clone();

                 int[] tempGrades = grades.clone();

                 for(int i = 0, len = tempNames.length ; i < len; ++i ){

                    for(int j = i + 1; j < len ; ++j ) {

                       if(tempGrades[j] > tempGrades[i]) {

                          String stemp = tempNames[i];

                          tempNames[i] = tempNames[j];

                          tempNames[j] = stemp;

                          int iTemp = tempGrades[i];

                          tempGrades[i] = tempGrades[j];

                          tempGrades[j] = iTemp;

                       }

                    }

                 }

                 System.out.println("-------성적-------");

                 for(int i = 0, len = names.length; i < len; ++i) {

                    System.out.println(tempNames[i] + "\t" + tempGrades[i]);

                 }

              }

           }